Rasbora truncata

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Rasbora truncata Lumbantobing, 2010

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drawing shows typical species in Danionidae.

分類 / Names 俗名 | 同種異名 | Catalog of Fishes(, ) | ITIS | CoL | WoRMS | Cloffa

Actinopteri > Cypriniformes (Carps) > Danionidae (Danios) > Rasborinae
Etymology: Rasbora: Rasbora, an Indian word for a fish, also used in Malay peninsula;  truncata: The specific name, truncata, from the Latin referring to the truncated lateral line system in this species, which has an incomplete lateral line and also has a truncated cephalic line.

Environment: milieu / climate zone / depth range / distribution range 生態學

; 淡水 底中水層性.   

分布 國家 | FAO區域 | 生態系 | 發現紀錄 | Point map | 簡介 | Faunafri

Asia: Alas River in northwestern Sumatra, Indonesia.

大小 / 重量 / 年齡

Maturity: Lm ?  range ? - ? cm
Max length : 3.8 cm SL 雄魚/尚未辨別雌雄; (Ref. 85846)

簡短描述 型態特徵 | 形態測量圖

背的軟條 (總數): 9; 臀鰭軟條: 7; 脊椎骨: 31 - 32. Distinguished from all members of Rasbora trifasciata-group by a weakly developed post-opercular streak, which extends ventrally to the horizontal through the ventral margin of pupil (vs. distinct streak, which extends ventrally to reach the axillary lobe of pectoral fin). Can be further diagnosed from other members in northwestern Sumatra by the following combination of characters: male cephalic tubercles conical, distinctly pointed, with a shallow, wide depression basally; presence of cranial superficial neuromasts (each basal plate is lower than the skin surface and surrounded by peripheral ridge and groove, respectively); the first infraorbital (lachrymal) with a relatively straight dorsal margin, but without a posterodorsal process; the lachrymal region peripherally pigmented with an unpigmented central area; absence of dorsomedial branch of supraorbital canal toward posterior margin of frontal; an axial streak extending forward and terminating at the area between vertical through the dorsal-fin origin and the pelvic-fin insertion; the cephalic tubercles present only in males; a transverse scale count anterior to the dorsal-fin origin and pelvic-fin insertion of K4/1/2K; 12 circumpeduncular scales; an immaculate opercular flap; a basal reticulation pattern comprised of a network of well-developed parenthesis-shaped bars on the midlateral surface of the body; a maximum vertical coverage of the basal reticulation two and a half longitudinal scale rows; the lateral line absent from one to six posterior scales (only 20-26 scales perforated); lateral line series unpigmented on the posterior portion; and the pelvic-fin rays i,7 (Ref. 94947).

生物學特性     字彙 (例如 epibenthic)

This species mostly inhabits moderate-flowing turbid rivers. In streams with fast-flowing water, it tends to form school at the stream margins or the pool regions along the river banks. It occurs sympatrically with Rasbora api and R. cf. sumatrana (Ref. 94947).

Life cycle and mating behavior 成熟度 | 繁殖 | 產卵場 | | 孕卵數 | 仔魚


主要參考資料 Upload your references | 參考文獻 | 合作者 | 合作者

Lumbantobing, D.N., 2010. Four new species of the Rasbora trifasciata-group (Teleostei: Cyprinidae) from northwestern Sumatra, Indonesia. Copeia 2010(4):644-670. (Ref. 85846)

IUCN 瀕危狀態 (Ref. 123251)

  未評估 

CITES (Ref. 123416)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

對人類具威脅

 





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生態毒物學
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孕卵數

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Estimates based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01000 (0.00244 - 0.04107), b=3.04 (2.81 - 3.27), in cm total length, based on all LWR estimates for this body shape (Ref. 93245).
營養階層 (Ref. 69278):  3.1   ±0.4 se; based on size and trophs of closest relatives
回復力 (Ref. 120179):  高度, 族群倍增時間少於 15個月 (Preliminary K or Fecundity.).
瀕危性 (Ref. 59153):  Low vulnerability (10 of 100) .